Singer and model Rosemary Odire, stage name Nyakusa Nyamama, spoke of the sneers she has faced when performing.
"I have encountered so many problems... people are like 'Yo big mama, what are you going to do there, you cannot dance, get off the stage,'" she said.
"But I am here portraying... not just any beauty, not just plus-size beauty, but the African beauty in me," added Odire, who swayed her hips on the runway in a leopard-skin skirt.
Coming from all walks of Kenyan society, the models did not have this level of confidence when they started training in March.
"They were very timid about their body sizes," recalled Walcott, adding that there was now a "huge difference".
The fashion show addresses health issues but also focuses on "accepting curvy women" and "celebrating their appearance by blending it with fashion due to the difficulty they face finding clothes," said Walcott.
Walcott created the show to honour her own mother -- so she could "see herself as beautiful."
"You see how big I am, I really hated my body, but she really encouraged me," said Walcott's mother, Seline Aoko, speaking at the fruit stall in Kisumu where she works.
"Big is beautiful!"